HTML
<mat-form-field >
<mat-chip-list #chipList aria-label="Fruit selection">
<mat-chip
*ngFor="let fruit of fruits"
[selectable]="selectable"
[removable]="removable"
(removed)="remove(fruit)">
{{fruit}}
<mat-icon matChipRemove *ngIf="removable">cancel</mat-icon>
</mat-chip>
<input
placeholder="New fruit..."
#fruitInput
[formControl]="fruitCtrl"
[matAutocomplete]="auto"
[matChipInputFor]="chipList"
[matChipInputSeparatorKeyCodes]="separatorKeysCodes"
[matChipInputAddOnBlur]="addOnBlur"
(matChipInputTokenEnd)="add($event)">
</mat-chip-list>
<mat-autocomplete #auto="matAutocomplete" (optionSelected)="selected($event)">
<mat-option *ngFor="let fruit of filteredFruits | async" [value]="fruit">
{{fruit}}
</mat-option>
</mat-autocomplete>
</mat-form-field>
COMPONENT TS
import {Component, ElementRef, ViewChild, AfterViewInit} from '@angular/core';
import {FormControl} from '@angular/forms';
import {MatAutocompleteSelectedEvent, MatAutocomplete, MatAutocompleteTrigger} from '@angular/material/autocomplete';
import {MatChipInputEvent} from '@angular/material/chips';
import {Observable, fromEvent} from 'rxjs';
import {map, startWith, tap} from 'rxjs/operators';
/**
* @title Chips Autocomplete
*/
@Component({
selector: 'chips-autocomplete-example',
templateUrl: 'chips-autocomplete-example.html',
styleUrls: ['chips-autocomplete-example.css'],
})
export class ChipsAutocompleteExample implements AfterViewInit {
visible = true;
selectable = true;
removable = true;
addOnBlur = true;
separatorKeysCodes: number[] = [ENTER, COMMA];
fruitCtrl = new FormControl();
filteredFruits: Observable<string[]>;
fruits: string[] = ['Lemon'];
allFruits: string[] = ['Apple ', ' Lemon', 'Lime', 'Orange', 'Strawberry'];
@ViewChild('fruitInput', {static: false}) fruitInput: ElementRef<HTMLInputElement>;
@ViewChild('auto', {static: false}) matAutocomplete: MatAutocomplete;
@ViewChild(MatAutocompleteTrigger, {static: false}) trigger: MatAutocompleteTrigger;
constructor() {
this.filteredFruits = this.fruitCtrl.valueChanges.pipe(
startWith(null),
map((fruit: string | null) => fruit ? this._filter(fruit) : this.allFruits.slice()));
console.log(this.allFruits)
}
ngAfterViewInit() {
fromEvent(this.fruitInput.nativeElement, 'click')
.pipe(
tap(() => {
this.trigger.openPanel()
})
).subscribe()
}
add(event: MatChipInputEvent): void {
// Add fruit only when MatAutocomplete is not open
// To make sure this does not conflict with OptionSelected Event
if (!this.matAutocomplete.isOpen) {
const input = event.input;
const value = event.value;
// Add our fruit
if (value) {
this.fruits.push(value);
}
// Reset the input value
if (input) {
input.value = '';
}
this.fruitCtrl.setValue(null);
}
}
remove(fruit: string): void {
const index = this.fruits.indexOf(fruit);
if (index >= 0) {
this.fruits.splice(index, 1);
}
}
selected(event: MatAutocompleteSelectedEvent): void {
this.fruits.push(event.option.viewValue);
this.fruitInput.nativeElement.value = '';
this.fruitCtrl.setValue(null);
console.log(this.fruits)
}
private _filter(value: string): string[] {
const filterValue = value.toLowerCase();
return this.allFruits.filter(fruit => fruit.toLowerCase().indexOf(filterValue) === 0);
}
}
I have list of fruits, with the help mat-autocomplete i can select the particular value, selected value convert into a mat-chip.
problem is initially fruit ' Lemon' have whitespace before L and 'Apple ' have whitespace after e, you can clearly see in the console initially array values have the whitespaces, after convert into an mat-chip in the console the whitespaces are automatically got removed, but i want those whitespaces in my mat-chip, how to do that ?
Stackblitz here https://stackblitz.com/edit/angular-sb38ig-fphy7s?file=app/chips-autocomplete-example.ts,app/chips-autocomplete-example.html
CodePudding user response:
In your styles.css:
mat-chip.mat-chip{white-space: pre;}
component.ts use value and not viewValue:
selected(event: MatAutocompleteSelectedEvent): void {
// this.fruits.push(event.option.viewValue);
this.fruits.push(event.option.value);
Then add any white spaces to your chips at beginning or end, it should work.